Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Can greater muscularity in larger individuals resolve the 3/4 power-law controversy when modelling maximum oxygen uptake? (CROSBI ID 111743)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Nevill, Alan ; Marković, Goran ; Vučetić, Vlatko ; Holder Roger Can greater muscularity in larger individuals resolve the 3/4 power-law controversy when modelling maximum oxygen uptake? // Annals of human biology, 31 (2004), 4; 436-445

Podaci o odgovornosti

Nevill, Alan ; Marković, Goran ; Vučetić, Vlatko ; Holder Roger

engleski

Can greater muscularity in larger individuals resolve the 3/4 power-law controversy when modelling maximum oxygen uptake?

Background: The power function relationship, MR = a• mb, between metabolic rate (MR) and body mass m has been the source of much controversy amongst biologists for many years. Various studies have reported mass exponents (b) greater than the anticipated 'surface-area' exponent 0.67, often closer to 0.75 originally identified by Kleiber. Aim: To provide a biological explanation for these 'inflated' exponents when modelling maximum oxygen uptake ( max), based on the observations from this and previous studies that larger individuals develop disproportionately more muscle mass in the arms and legs. Research Design and subjects: Cross-sectional. Subjects were 119 professional soccer players from Croatia aged 18-34. Results: Here we confirm that the power function relationship between max and body mass of the professional soccer players results in an 'inflated' mass exponent 0.75 (95% confidence interval from 0.56 to 0.93), but also the larger soccer players have disproportionately greater leg muscle girths. When the analysis was repeated incorporating the calf and thigh muscle girths rather than body mass as predictor variables, the analysis not only explained significantly more of the variance in max, but the sum of the exponents confirmed a surface-area law. Conclusions: These findings confirm the pitfalls of fitting body-mass power laws and suggest using muscle-girth methodology as a more appropriate way to scale or normalize metabolic variables such as max for individuals of different body sizes.

metabolic rate; maximum oxygen uptake; body size; allometric scaling

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

31 (4)

2004.

436-445

objavljeno

0301-4460

Povezanost rada

nije evidentirano

Indeksiranost